Iced does not work any more on latest nightly (1.73.0)

[AlphaAmphib]

Yesterday upgraded rust to the latest nightly, producing the following bug in another project of mine:

error[E0635]: unknown feature proc_macro_span_shrink
--> /home/amfib/.cargo/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.59/src/lib.rs:92:30
|
92 | feature(proc_macro_span, proc_macro_span_shrink)
| ^^^^^^^^^^^^^^^^^^^^^^

However my current iced project shows the same error now, the solution is to update crate proc-macro2 to the latest version, see solution. As iced has a bunch of indirect dependencies to this crate, I omit mentioning them all here.

[AlphaAmphib]

just checked 1.72.0 (nightly-2023-07-07) also broken